scholarly journals Thermal Properties of Carbon Nanotube (CNT) Reinforced Polyvinyl Alcohol (PVA) Composites

2013 ◽  
Vol 17 ◽  
pp. 59-66 ◽  
Author(s):  
Monirul Hasan ◽  
Sujan Kumar Das ◽  
Jahid M.M. Islam ◽  
Md Abdul Gafur ◽  
Enamul Hoque ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Carbon Nanotube ◽  
Polyvinyl Alcohol ◽  
Glass Transition Point ◽  
Casting Method ◽  
Thermo Gravimetric ◽  
Solar Cell Application ◽  
Gum Acacia ◽  
Thermal Analyzer ◽  
Solution Casting Method

Homogeneous Polyvinyl alcohol (PVA)/Carbon nanotube (CNT) composite has been prepared by solution casting method using gum acacia as a surfactant. CNT content in the composite was varied from 5-10% by weight. The thermal properties of PVA/CNT composites were investigated by Thermo Gravimetric/Differential Thermal Analyzer (TG/DTA) and Thermo Mechanical Analyzer (TMA). TG/DTA results showed that higher thermal stability in higher percentage of CNT in the composites. The 10% CNT containing PVA composite exhibit highest onset of melting, glass transition point and offset of melting temperature and the recoded values are 330.4K, 379K and 421.3K respectively. All of the result indicates that the developed PVA/CNT composite might be promising for use in solar cell application

Effect of Gelatinization on Morphology and Thermal Properties of Polyvinyl Alcohol-Corn Starch Blend Films

2012 ◽  
Vol 724 ◽  
pp. 89-92
Author(s):  
Ji Wei Li ◽  
Xue Gang Luo ◽  
Xiao Yan Lin ◽  
Xian Hong Li
Keyword(s):  
Weight Loss ◽  
Thermal Properties ◽  
Polyvinyl Alcohol ◽  
Corn Starch ◽  
Casting Method ◽  
Scanning Calorimetry ◽  
Blend Films ◽  
Hydrogen Bonding Interactions ◽  
Gelatinized Starch ◽  
Solution Casting Method

The blend films of ungelatinized and gelatinized starch/polyvinyl alcohol (PVA) were prepared by solution casting method. Their morphologies and thermal properties were analyzed by scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). A droplet phase was observed in the blends containing ungelatinized starch and a laminated phase was observed in the blends containing gelatinized starch. For both ungelatinized and gelatinized starch/PVA blends the melting temperature (Tm) (210230) of PVA was detected, and the Tm of gelatinized starch/PVA blends was higher than that of the ungelatinized starch/PVA blends. TGA results showed that over the rst 300 the weight loss for ungelatinized starch/PVA blends was higher than that for gelatinized starch/PVA blends, however the gelatinized starch/PVA blends showed the greater weight loss after scanning up to 400. Different morphologies and thermal properties of two types of blends were attributed to the different hydrogen bonding interactions between starch and polyvinyl alcohol.

scholarly journals Physico-Mechanical, Morphological Properties of Polyvinyl Alcohol/Palm Kernel Shell/Coconut Kernel Shell Elastomeric Polymer Nanocomposites

2018 ◽  
Vol 5 (2) ◽  
pp. 296-303
Author(s):  
Josephine Chang Hui Lai ◽  
Nor Liyana Yusof
Keyword(s):  
Polyvinyl Alcohol ◽  
Polymer Nanocomposites ◽  
Moisture Absorption ◽  
Palm Kernel ◽  
Morphological Properties ◽  
Test Results ◽  
Casting Method ◽  
Palm Kernel Shell ◽  
Coconut Kernel ◽  
Solution Casting Method

In this study, the physico-mechanical and morphological properties of polyvinyl alcohol/palm kernel shell/coconut kernel shell elastomeric polymer nanocomposites (PVA/PKS/CKS EPNCs) were investigated. PVA/PKS/CKS EPNCs were prepared via solution casting method and the properties of the elastomeric polymer nanocomposites were characterized through Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), tensile testing and moisture absorption test. Test results showed that increasing the PVA content increased the mechanical properties of elastomeric polymer nanocomposites as well as provided better surface morphology. However, beyond certain percentage of PVA content, the moisture absorption increased too. Therefore, 55wt% of PVA/PKS/CKS EPNCs was chosen as the best elastomeric polymer nanocomposites as it had the best overall properties from the aspect of physico-mechanical, morphological and moisture absorption.

Comparison of Starch Fiber Filled-Polyvinyl Alcohol and Native Starch Filled-Polyvinyl Alcohol under Tensile Analysis

2015 ◽  
Vol 1113 ◽  
pp. 19-22 ◽  
Author(s):  
Mohd Salleh Shahrul Nizam ◽  
Norzila Mohd ◽  
Zarina Omar ◽  
Norkamruzita Saadon
Keyword(s):  
Tensile Strength ◽  
Polyvinyl Alcohol ◽  
Interfacial Adhesion ◽  
Continuous Phase ◽  
Distilled Water ◽  
Solution Casting ◽  
Test Results ◽  
Casting Method ◽  
Native Starch ◽  
Solution Casting Method

The tensile properties of starch fiber (SF) and native starch (NS) filled polyvinyl alcohol were investigated in this study. Polyvinyl Alcohol (PVA) was blend with starch fiber as well as native starch. Prior to compounding process, PVA was plasticized with 30 phr glycerol as well as 10 phr distilled water. A solution casting method was used to prepare the SF-PPVA and NS-PPVA film sheet. Based on the tensile test results SF filled PVA recorded the highest tensile strength (20.015 MPa) as compared to NS filled PVA (12.302MPa). The tensile strength of the blends film was depending to the interfacial adhesion between matrixes in the blends. In spite of that, NS filled PVA have noted the highest elongation during the test. SF and NS played important role in affecting the blends matrix through disturbing the arrangement of continuous phase of PVA.

scholarly journals ENHANCEMENT OF ELECTRICAL CONDUCTIVITY IN POLYVINYL ALCOHOL FILMS BY DOPING WITH Nd3+IONS

2017 ◽  
Vol 5 (4RAST) ◽  
pp. 87-91
Author(s):  
Vijaya Kumar
Keyword(s):  
Electrical Conductivity ◽  
Polyvinyl Alcohol ◽  
Dopant Concentration ◽  
Nitrate Hexahydrate ◽  
X Ray Diffraction ◽  
Casting Method ◽  
Xrd Pattern ◽  
X Ray ◽  
Solution Casting Method ◽  
Polyvinyl Alcohol Films

The electrical properties of polyvinyl alcohol (PVA) films have been improved pronouncedly by doping with Neodymium (III) nitrate hexahydrate.  Pure PVA and PVA: Nd3+ films have been prepared by solution casting method. Both type of films were characterized by X-ray diffraction technique for structural studies. XRD pattern shows the appreciable shift of 2Ө towards higher value with increase in Nd3+ concentration. This signifies the presence Nd3+ dopant in polymer matrix. Further direct current electrical conductivity (σ) of Nd3+ doped PVA films in the temperature range 500C-1600C has been studied using four probe techniques. For a given concentration σ increases with increase in temperature and with dopant concentration. At 1200C, conductivity of PVA: Nd3+ (10 mol %) film is 7.116 μΩ-1cm-1, PVA: Nd3+ (15 mol %) film is 11.176 μΩ-1cm-1, PVA: Nd3+ (20 mol %) film is 17.418 μΩ-1cm-1 and PVA: Nd3+ (25 mol %) film is 23.740 μΩ-1cm-1. This result indicated the enhancement of the electrical conductivity of PVA films with Nd3+ concentration.

scholarly journals Tensile Strength and Moisture Resistance Properties of Biocomposite Films Based on Polyvinyl Alcohol (PVA) with Cellulose as Reinforcement from Durian Peel Fibers

2021 ◽  
Vol 302 ◽  
pp. 02001
Author(s):  
Melbi Mahardika ◽  
Mochamad Asrofi ◽  
Devita Amelia ◽  
Edi Syafri ◽  
Sanjay Mavinkere Rangappa ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Polyvinyl Alcohol ◽  
Cellulose Fibers ◽  
Moisture Resistance ◽  
Solution Casting ◽  
Casting Method ◽  
Elongation At Break ◽  
Biocomposite Films ◽  
Solution Casting Method ◽  
Biocomposite Film

Polyvinyl Alcohol (PVA) based biocomposite film with cellulose was successfully fabricated by the solution casting method. The cellulose fibers were obtained by extraction of durian peel using alkalization and bleaching treatments. These treated cellulose fibers were used for the fabrication of PVA-based biocomposites. The durian peel cellulose fibers were varied by 2%, 4%, 6%, and 8% in the PVA matrix. Tensile test and moisture resistance of biocomposites were evaluated. The 6% addition of cellulose fibers in biocomposites increases the tensile strength up to 54% (37 MPa) than pure PVA film (24 MPa). Conversely, it reduces the elongation at break of the biocomposite film. Meanwhile, the moisture resistance properties of the biocomposites increased with the addition of cellulose fibers. The tensile strength and moisture resistance of biocomposites have been increased due to the homogeneous dispersion of the cellulose fibers and PVA matrix. These biocomposites able to reduce the environmental impacts by utilizing residual lignocellulosic biomass.

Synthesis, characterization and optical properties of polyvinyl alcohol–cerium oxide nanocomposite films

RSC Advances ◽  
2016 ◽  
Vol 6 (78) ◽  
pp. 74354-74366 ◽  
Author(s):  
K. S. Hemalatha ◽  
K. Rukmani
Keyword(s):  
Optical Properties ◽  
Polyvinyl Alcohol ◽  
Cerium Oxide ◽  
Nanocomposite Films ◽  
Solution Casting ◽  
Uv Filters ◽  
Casting Method ◽  
Solution Casting Method

PVA–CeO2 nanocomposite films were synthesized by solution casting method and exhibit tape like nanoribbon structure in the 25 wt% CeO2 films. The 2.5 wt% and 25 wt% CeO2 films are suitable for UV filters while the 2.5 wt% film shows highest photoluminescence.

Mechanical and Thermal Properties of Thermoplastic Film from Tacca leontopetaloides Starch Reinforced with Rice Husk Biochar

2017 ◽  
Vol 890 ◽  
pp. 188-191
Author(s):  
Ainatul Mardhiah Mohd Amin ◽  
Suhaila Mohd Sauid ◽  
Mohamad Sufian So’aib ◽  
Mohibah Musa ◽  
Ku Halim Ku Hamid
Keyword(s):  
Thermal Properties ◽  
Rice Husk ◽  
Agricultural Waste ◽  
Mechanical And Thermal Properties ◽  
Casting Method ◽  
Elongation At Break ◽  
Degradation Temperature ◽  
Solution Casting Method ◽  
Rice Husk Biochar ◽  
Disposal Problem

The objective of this study is to investigate the mechanical and thermal properties of thermoplastic film (TPS) from Taccaleontopetaloides starch. T.leontopetaloides was opted as starch source due to its abundance in nature, cheap and non-staple food in Malaysia. Biochar from rice husk was incorporated with T. leontopetaloides starch as a novel idea to enhance the properties of the thermoplastic film and solving the agricultural waste disposal problem. The TPSs were developed through solution casting method. Incorporation of biochar into TPS (TPS-BChr) composite significantly improved the tensile strength and elongation at break (EAB) properties of TPS. Thermal analysis showed that TPS10%-BChr composite had the highest maximum degradation temperature and the highest amount of residue (23.94%) compared to other TPS’s compositions. These results showed that incorporation of biochar into TPS significantly improved the mechanical and thermal properties of the TPS.

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